What Did Sageman Observe About How Religious Members of Terrorist

What did Sageman observe about how religious members of terrorist groups were before they joined?

A) Generally, most members were never more than moderately religious before joining a terrorist group.
B) Almost all members were described as being very religious prior to joining.
C) Most members had not been religious during their lives.
D) Members had been very religious when they were younger but later found that it brought them very little peace.